VB.NET - Unable to find connection

I get "Unable to find connection 'TMMConnectionString' for object 'MySettings'.
The connection string could not be found in application settings, or the data provider
associated with the connection string could not be loaded. "

I've looked at the .xsd file in the XML Editor, and I have the code snippet attached here I only have this one connection string. When I run the program, everything works just fine! But when I try to update the queries or add any columns, etc. in the .xsd DataSet Designer, I get the error. I've also attached the screenshot of the error. Any ideas?

If you right click on blue bar of OLP_LCTNS and select configure. Select previous then previous you should see the dropdown for the connection string.
Or
right click on blue bar of OLP_LCTNS and select

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